We define three classes of interfaces based on the difficulty
involved in building a URL. These are, in order of increasing
ease-of-use:
- Command line - One types a fully constrained URL
- General purpose URL builder - One fills in a form
and a URL is built. Does not require any semantic metadata
- Graphical User Interface - Makes use of
semantic metadata to generate URLs based on geophysical variable
selection made by the user.
